Parallel bars for gymnasiums



UNITED STATES FREDERICK MEDART, OF ST. LOUIS, MISSOURI.

PATENT EErcE PARALLEL BARS FOR GYMNASIUNES.

SPECIFICATION forming part of Letters Ilatent No. 412,772, dated October 15, 1889.

Application tiled July 19, 1888. Serial No. 280,422. (No model.)

to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specication, and in Which- .Figure 1 is an end elevation, partly sectionized, of a set of parallel bars embodying my invention; Fig. 2, an enlarged end elevation of the lower end of one of the legs or posts, illustrating the means for adjusting the same on the supporting-base of the apparatus; Fig. 3, an enlarged, detail side View of the same; Fig. 4, a detail view of bracket attachment; Fig. 5, an enlarged detail section illustrating the means forclamping the adjustable members of the legs or postsin position; Fig. 5X, a detail side view of the same; Fig. 6, a detail section of the supporting-base of the apparatus, showing Athe caster' appliance in its inoperative position; Fig. 7, a similar View of the same in its operative position,

y and Fig. 8 a detail plan of the same.

Similar letters of reference indicate like parts 1n the several views.

The present invention relates to certain imu provements in the form of parallel bars for gymnasiums described in Letters Patent No. 187,477, issued February 20, 187 7, to Philip Medart and Frederick Medart; and the present improvements have for their object to provide an improved construction of parallel bars in which are embodied the features of a parallel adjustment of the bars to and from each other in ahorizontal plane, the holding of the parts at such adjustment in a strongA and substantial manner, the ready and convenient adjustment of the parallel bars to any proper height, a guide or scale for indicating the various heights or adjustments in which the parallel bars can be placed, and an adjustable roller or caster attachment for affording means for the .easy movement of the apparatus from place to place.

To enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to more fully describe the construction of parts and mode of zontal parallel bars D D, such pivotal attachment being effected by a pivot-bolt c, and a clam ping-bolt c', the slot C2, through Which the bolt passes in one of the parts, being made elongated, so as to admit of the pivotal adjustment of the posts or legs C upon the standards or uprights B. I have shown the pivotvbolt c arranged at the upper end of each standard and the clamping-bolt c near the bot-tom of the same. The arrangement can,

however, be reversed without departing from the spirit of my invention, and, similarly, the elongated slot c2 may be formed in either the upright B or the post O without affecting the spirit of my invention. The posts C are made in sections, the main or lower section C being hollow, preferably of an open-sided U shape, as shown, to receive the upper section O2, which is of a round form preferably, and is arranged to slide vertically in the main section, C3 being a guide-collar at the upper end of the section C to hold the section C2 in place. The rod or section C2 is clamped and held to the required adjustment by means of a clamping-sleeve E, encircling such rod or section and arranged to move laterally in a recess e in the section C', as shown, c being a laterally-proj ecting screw-threaded stem on the sleeve E, and E a nut upon the same to effect the lateral adjustment of the sleeve E to clamp and bind the rod or section C2 against IOO members F of which fit upon the upper ends,

rods, or members C2, and are iirmly secured thereto by vertical screw-bolts G, the heads of which are housed in the hollow swelled portions F2 of the brackets. The horizontal members F3 of the brackets are concaved on top to iit the under surface of the parallel bars D, and are secured thereto by bolts G', as shown. By this construction a irm and substantial connection is afforded between the parallel bars and their supporting feet or legs C wit-hout offering an obstruction to the ordinary use of such parallel bars.

His a vertical series of holes in each of the main or lower leg-sections C, which I prefer to mark or number, so as to indicate the height of the parallel bars from the floor. In use a pin or rod h will be inserted in the desired hole of the series, and the parallel bars then lowered until the end of the adj ustable post member C2 rests upon such pin or rod, after which they are iirmly clamped in position by the nut E and the laterallydnoving clamping-sleeve E.

I I are a pair of hollow counterpart proj cctions extending out from the side of each base-section A, and forming preferably an integral part of the same. In the interior of these projections the casters .I are arranged, their vertical pivotal connections being formed by blocks I, capable of limited vertical movement in the central orifices of the projections I, as shown, and having heads t' to prevent their slipping down through such orifices when the base of the apparatus is lifted from the iioor. Ordinarily the casters will be entirely within the projections I, as indicated in Fig. G, with the supporting-base A resting directly on the floor. In order to bring the casters into use, it is only necessary to lift the base A up from the iloor, when the casters will descend into the position indicated in Fig. 7, in which position they can be secured by the swinging latch-piece I2, pivoted at one end to the top of the projections I, its other end being engaged under a hook-lug i', as indicated in Figs. 7 and 8. As so arranged the apparatus will be supported on the easters, and can be readily moved from place to place as desired.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

l. A set of parallel bars for gymnasiuins, comprising, in combination, the base A and standards B, the bars D, and the supporting-posts C, secured to the standards B by a pivot-bolt c, so as to be capable of a pivot-al adjustment in a lateral direction, essentially as set forth.

2. A set of parallel bars for gymnasiums, comprising, in combination, the base A and the standards B, the posts C, provided with elongated slots, pivot-bolt c, and clampingbolts c', passing through said slots, essentially as set forth.

3. The combination, in' a set of parallel bars for gymnasiums, of the posts or legs C,

formed in sections, and made vertically ad-y justable one upon the other, the laterallymoving clamping-sleeve E, stem e', and nut E', substantially as described.

4. The combination, 'in a set of parallel bars for gymnasiums, of the parallel bars D D and posts C with the T-shaped bracket F, having a vertical socket member F and a horizontal member F3, and having its top concaved, substantially as and for the purpose set forth.

5. rl`he combination, in a set of parallel bars for gymnasiums, of the parallel bars I) D and posts C with the T-shaped bracket F, having a vertical socket member F a hollow swelled portion F2, and a horizontal member F3, having its top coneaved, and vertical attaching-bolt G, the head of which is arranged within the swelled portion F2 of the bracket, substantially as described.

G. The combination of the hollow projections I, easters J, vertically-moving blocks I', latch-piece I2, and hook-lug L", substantially as set forth.

In testimony whereof witness my hand this 12th day of July, 1888.

FREDERICK MEDART.

In presence Of- C. W. STEINMETZ, E. W. BENSON, J r. 

